<template>
  <div class="app-container">
    <el-form inline>
      <el-form-item>
        <el-input placeholder="用户名" v-model="searchObj.username" />
      </el-form-item>

      <el-button type="primary" icon="el-icon-search" @click="search">查询</el-button>
      <el-button type="default" @click="resetSearch">清空</el-button>
    </el-form>

    <div style="margin-bottom: 20px">
      <el-button type="primary" @click="addUser" v-if="$hasBP('btn.User.add')">添 加</el-button>
      <el-button type="danger" @click="revomveUsers" :disabled="selectedIds.length === 0"
        v-if="$hasBP('btn.User.remove')">批量删除</el-button>
    </div>

    <el-table border stripe :data="items" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55" />
      <el-table-column type="index" label="序号" width="80" align="center" />
      <el-table-column prop="username" label="用户名" width="150" />
      <el-table-column prop="nickName" label="用户昵称" />
      <el-table-column prop="roleName" label="角色列表" />
      <el-table-column prop="gmtCreate" label="创建时间" width="180" />
      <el-table-column prop="gmtModified" label="更新时间" width="180" />
      <el-table-column label="操作" width="230" align="center">
        <template slot-scope="{ row }">
          <HintButton type="info" size="mini" icon="el-icon-user-solid" title="分配角色" v-if="$hasBP('btn.User.assgin')"
            @click="showAssignRole(row)" />
          <HintButton type="primary" size="mini" icon="el-icon-edit" title="修改用户" v-if="$hasBP('btn.User.update')"
            @click="showUpdateUser(row)" />
          <el-popconfirm :title="`确定删除 ${row.username} 吗?`" @onConfirm="removeUser(row.id)">
            <HintButton style="margin-left: 10px" slot="reference" type="danger" size="mini" icon="el-icon-delete"
              title="删除用户" v-if="$hasBP('btn.User.remove')" />
          </el-popconfirm>
        </template>
      </el-table-column>
    </el-table>

    <el-pagination :current-page="page" :page-size="limit" :total="total" :page-sizes="[5, 10, 20, 30, 40, 50, 100]"
      style="padding: 20px 0" layout="prev, pager, next, jumper, ->, sizes, total" @current-change="getUsers"
      @size-change="handleSizeChange" />

    <el-dialog :title="user.id ? '修改用户' : '添加用户'" :visible.sync="dialogUserVisible">
      <el-form ref="userForm" label-width="120px" :model="user" :rules="userRules">
        <el-form-item label="用户名" prop="username">
          <el-input v-model="user.username" />
        </el-form-item>
        <el-form-item label="用户昵称">
          <el-input v-model="user.nickName" />
        </el-form-item>
        <el-form-item v-if="!user.id" label="用户密码" prop="password">
          <el-input v-model="user.password" />
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="cancel">取 消</el-button>
        <el-button type="primary" @click="addOrUpdateUser">确 定</el-button>
      </div>
    </el-dialog>

    <el-dialog title="设置角色" :visible.sync="dialogRoleVisible">
      <el-form label-width="80px">
        <el-form-item label="用户名">
          <el-input disabled :value="user.username"></el-input>
        </el-form-item>

        <el-form-item label="角色列表">
          <el-checkbox :indeterminate="isIndeterminate" v-model="checkAll" @change="handleCheckAllChange">全选</el-checkbox>
          <div style="margin: 15px 0"></div>
          <el-checkbox-group v-model="userRoleIds" @change="handleCheckedChange">
            <el-checkbox v-for="role in allRoles" :key="role.id" :label="role.id">{{ role.roleName }}</el-checkbox>
          </el-checkbox-group>
        </el-form-item>
      </el-form>

      <div slot="footer">
        <el-button :loading="loading" type="primary" @click="assignRole">保存</el-button>
        <el-button @click="resetRoleData">取消</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import { mapGetters } from "vuex";
import UserApi from "@/api/acl/user";
export default {
  name: "AclUserList",
  data() {
    return {
      page: 1, //当前页码
      limit: 5, //每页显示5个
      searchObj: {
        username: "",
      },
      selectedIds: [], // 所有选择的user的id的数组
      dialogUserVisible: false, // 是否显示用户添加/修改的dialog
      user: {},
      userRules: {
        // 用户添加/修改表单的校验规则
        username: [
          { required: true, message: "用户名必须输入" },
          { min: 4, message: "用户名不能小于4位" },
        ],
        password: [{ required: true, validator: this.validatePassword }],
      },
      dialogRoleVisible: false, // 是否显示角色Dialog
      allRoles: [], // 所有角色列表
      userRoleIds: [], // 用户的角色ID的列表
      checkAll: false, // 是否全选
      isIndeterminate: false, // 是否是不确定的
      loading: false, // 是否正在提交请求中
    };
  },
  methods: {
    //自定义密码校验
    validatePassword(rule, value, callback) {
      if (!value) {
        callback("密码必须输入");
      } else if (!value || value.length < 6) {
        callback("密码不能小于6位");
      } else {
        callback();
      }
    },
    // 获取分页列表数据
    getUsers(page = 1) {
      this.page = page;
      const { limit, searchObj } = this;
      this.$store.dispatch("getUsers", {
        page,
        limit,
        searchObj,
      });
    },
    //查询
    search() {
      this.getUsers();
    },
    //清空
    resetSearch() {
      this.searchObj.username = "";
      this.getUsers();
    },

    //添加按钮
    addUser() {
      this.user = {};
      this.dialogUserVisible = true;
      this.$nextTick(() => this.$refs.userForm.clearValidate());
    },
    // 添加或更新用户请求
    addOrUpdateUser() {
      this.$refs.userForm.validate((valid) => {
        if (valid) {
          const { user } = this;
          this.$store.dispatch("addOrUpdateUser", user).then((result) => {
            if (!user.id) {
              this.$message.success("添加成功");
            } else {
              this.$message.success("更新成功");
            }
            this.user = {};
            this.dialogUserVisible = false;
            this.getUsers();
          });
        }
      });
    },

    //取消用户的保存或更新
    cancel() {
      this.dialogUserVisible = false;
      this.user = {};
    },
    //显示更新用户的界面
    showUpdateUser(user) {
      this.user = user;
      this.dialogUserVisible = true;
    },

    //处理pageSize发生改变回调
    handleSizeChange(pageSize) {
      this.limit = pageSize;
      this.getUsers();
    },

    //删除所有选中的用户
    revomveUsers() {
      this.$confirm("确定删除吗?")
        .then(async () => {
          const result = await UserApi.removeUsers(this.selectedIds);
          this.$message.success("删除成功");
          this.getUsers();
        })
        .catch(() => {
          this.$message.info("取消删除");
        });
    },

    //删除某个用户
    async removeUser(id) {
      await UserApi.removeById(id);
      this.$message.success("删除成功");
      this.getUsers(this.users.length === 1 ? this.page - 1 : this.page);
    },

    //列表选中状态发生改变的监听回调
    handleSelectionChange(selection) {
      this.selectedIds = selection.map((item) => item.id);
    },

    //显示指定角色的界面
    showAssignRole(user) {
      this.user = user;
      this.dialogRoleVisible = true;
      this.getRoles();
    },

    //获取角色列表
    async getRoles() {
      const id = this.user.id;
      const result = await UserApi.getRoles(id);
      const { allRolesList, assignRoles } = result.data;
      this.allRoles = allRolesList;
      this.userRoleIds = assignRoles.map((item) => item.id);
      this.checkAll = allRolesList.length === assignRoles.length;
      this.isIndeterminate =
        assignRoles.length > 0 && assignRoles.length < allRolesList.length;
    },

    //设置角色全选勾选状态发生改变的监听
    handleCheckAllChange(value) {
      // value 当前勾选状态true/false
      // 如果当前全选, userRoleIds就是所有角色id的数组, 否则是空数组
      this.userRoleIds = value ? this.allRoles.map((item) => item.id) : [];
      // 如果当前不是全选也不全不选时, 指定为false
      this.isIndeterminate = false;
    },

    //角色列表选中项发生改变的监听
    handleCheckedChange(value) {
      const { userRoleIds, allRoles } = this;
      this.checkAll =
        userRoleIds.length === allRoles.length && allRoles.length > 0;
      this.isIndeterminate =
        userRoleIds.length > 0 && userRoleIds.length < allRoles.length;
    },

    //设置角色请求给角色进行授权
    async assignRole() {
      const userId = this.user.id;
      const roleIds = this.userRoleIds.join(",");
      this.loading = true;
      const result = await UserApi.assignRoles(userId, roleIds);
      this.loading = false;
      this.$message.success(result.message || "分配角色成功");
      this.getUsers();
      this.resetRoleData();

      if (this.$store.getters.name === this.user.username) {
        window.location.reload();
      }
    },
    //重置用户角色的数据
    resetRoleData() {
      this.dialogRoleVisible = false;
      this.allRoles = [];
      this.userRoleIds = [];
      this.isIndeterminate = false;
      this.checkAll = false;
    },
  },
  computed: {
    ...mapGetters(["items", "total"]),
  },

  mounted() {
    this.getUsers();
  },
};
</script>